The Chromawheel project got a nice writeup in Synthtopia. Chromawheel Music Compass allows students to play with music theory in a unique, tactile way, and to see how music works.

http://www.synthtopia.com/content/2019/03/06/chromawheel-an-instrument-that-helps-you-visualize-and-interact-with-music-theory/?fbclid=IwAR1x5_fpE10-5HvZEfFHmxbJT_PfWDbrE1VYTD6hq5V7O-CtEsl7sVX0pGQ